directed me to websites selling exam materials. Those websites sell stuff at a price between $200 and $300, usually under the title of "premier set" or "deluxe set." From the high price, I got an impression that Series 7 exam must be very big and difficult. It got me worried for a while. Then I checked Amazon.com and found Series 7 for Dummies for under $15, also Barron's book at a cheaper price, a little over $11. It suddenly dawns on me that I was deceived by the prop firm who recommended those book-selling companies. And it further dawns on me that this field of securities is full of crooks. Then I suddenly realize that there is a link between "premier set" and "enhanced high-grade fund": the usage of glittering generalities in packaging the garbage they are selling in this field. Then I think again and decide that I may be wrong in my inference. I should give them the benefit of doubt. The prop firm may genuinely think the "premier set" is worth $250. They may not be aware of those books sold under $15 on Amazon.com. If that is the case, they are not crooked/dishonest/deceiving, they are simply ignorant/stupid/intellectually challenged. After reaching the latter conclusion, another discovery comes to my mind: 95% of the people in this field fail because most of them are simply stupid. Am I right? I may be wrong. Since I want to join the field, I could be as stupid as them. Oh, boy, what a miserable field: 95% fail??!!